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Re: [Qemu-devel] virtio: network: lost tcp/ip packets
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From: |
Stefan Priebe - Profihost AG |
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Subject: |
Re: [Qemu-devel] virtio: network: lost tcp/ip packets |
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Date: |
Wed, 30 Aug 2017 19:52:16 +0200 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.1 |
Hello Stefan,
Am 30.08.2017 um 19:17 schrieb Stefan Hajnoczi:
> On Fri, Aug 18, 2017 at 04:40:36PM +0200, Stefan Priebe - Profihost AG wrote:
>> i've a problem with two VMs running on the SAME host machine using qemu
>> 2.7.1 or 2.9.0 and vhost_net + virtio.
>>
>> Sometimes TCP packets going from machine a to machine b are simply lost.
>> I see them in VM A using tcpdump going out but they never come in on
>> machine B. Both machines have iptables and stuff turned off.
>>
>> On the host both VMs network interfaces are connected to the same bridge.
>>
>> Any ideas? May be a known bug?
>>
>> Host and Guest Kernel is an OpenSuSE 42.3 kernel based on vanilla 4.4.82.
>
> Have you tcpdumped the tap interfaces on the host?
>
currently i can't reproduce the issue - even i was for two days.
Currently i've no idea what has happend and will report back if it
happens again.
Thanks!
Greets,
Stefan